Sensor apparatus

Details Sensor apparatus Sensor apparatus

2005-05-16

2009-12-22

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S320000

Reexamination Certificate

active

07635942

ABSTRACT:
A sensor apparatus and method for detecting an environmental factor is shown that includes an acoustic device that has a characteristic resonant vibrational frequency and mode pattern when exposed to a source of acoustic energy and, further, when exposed to an environmental factor, produces a different resonant vibrational frequency and/or mode pattern when exposed to the same source of acoustic energy.

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patent: 2003/0128366 (2003-07-01), Deason et al.

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